A Digital Developer suspects a logical error in a script. Which action will help locate the error?

A developer is asked to improve the maintainability of a page by reducing its code repetition.
What are two techniques the developer should implement to achieve this?
Choose 2 answers.

A Digital Developer is working on a project to convert a pipeline to a JavaScript controller. UX Studio has a functioning pipeline debugger configured for the site. Assume the Developer will add a breakpoint to the controller when it is written.
What must be done in order to use the debugger with the new controller when it is written?

Which two items are appropriate content of custom logs implemented at checkout?
Choose 2 answers:

A Newsletter controller contains the following route:
Server.post('Subscribe', function (req,res,next){
var newsletterForm = server.forms.getForm('newsletter');var CustomObjectMgr = require('dw/object/CustomObjectMgr'); if(newsletterForm.valid){ try{ var CustomObject = CustomObjectMgr.createCustomObejct('NewsletterSubscription', newsletterform.email.value); CustomObject.custom.firstName = newsletterForm.fname.value; CustomObject.custom.lastName = newsletterForm.lname.value;-
} catch(e){
//Catch error here
}
}
next();
});
Assuming the Custom Object metadata exists, why does this route fail to render the newsletter template when the subscription form is correctly submitted?